JPH0674330U - Stretch label - Google Patents

Abstract

(57) [Abstract] [Purpose] The adhesion of the printing ink to the film 1 is improved by improving the material of the film 1 which is the base of the stretch label and the binder of the printing ink, and the self-adhesion of the film 1 is improved. It is an object of the present invention to provide a stretch label having a very good appearance without causing deterioration of the printed state by sufficiently following the stretchability. [Structure] A flat film sheet 3 made of a stretch film 1 having a self-stretchability, which is formed into a tubular bag and has a printing layer 2 provided on the inner surface side thereof, and a container 4
In a stretch label that is opened in a tubular shape from the flat state to be externally fitted and attached, the stretch film 1 is composed of an ethylene-vinyl acetate copolymer containing 3 to 8% vinyl acetate, and the print layer 2 is used. Is composed of printing ink using a polyurethane resin as a binder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stretch label to be attached to various containers such as bottles, cans and PET bottles.

[0002]

[Prior art]

 In general, a stretch label is, for example, as shown in FIG. 4, an end portion of a polyethylene-based self-stretchable stretch film 10 provided with a printed layer 9 (see FIG. 5) on which the design or trademark is printed on the inner surface side. After joining 11, 11 pieces together to make a bag (see Fig. 4 (a)), fold it flatly and wind it into a roll (see Fig. 4 (b)). The rolled-up stretch film 10 is sequentially fed out, cut into a certain size 12 (see FIG. 4 (c)), opened in a tubular shape (see FIG. 4 (d)), and placed in a container 13 such as a PET bottle. It was installed by fitting it on the outside.

[0003]

[Problems to be solved by the device]

 However, at the time of the opening, the film 10 is stretched (expanded) because it has self-stretchability, but the printing ink of the printing layer 9 does not stretch accordingly, so As shown in FIG. 5, a crack 15 is formed in the printing ink film at the position of the fold line 14 that has been folded flat, and as shown in FIG. The problem has arisen that some of the 17 are missing.

The present invention has been made in view of the above-mentioned problems of the related art, and by improving the material of the film 1 which is the base of the stretch label and the binder of the printing ink, the film 1 of the printing ink is improved. It is an object of the present invention to provide a stretch label having a very good appearance without impairing the printing state, by improving the adhesion to the film and sufficiently following the self-expanding property of the film 1.

[0005]

[Means for Solving the Problems]

 The technical means taken by the present invention to solve the above-mentioned problems are a flat state made of a stretch film 1 having self-stretchability which is formed into a tubular bag and has a printing layer 2 provided on the inner surface side. In a stretch label which is composed of a film sheet 3 and which is opened from the flat state into a tubular shape so as to be fitted onto the container 4, the stretch film 1 is an ethylene-vinyl acetate copolymer containing 3 to 8% vinyl acetate. In addition to the above, the printing layer 2 is made of printing ink having a polyurethane resin as a binder.

[0006]

[Action]

 In the stretch label according to the present invention, the stretch film 1 used for the label is composed of a film made of an ethylene-vinyl acetate copolymer containing 3 to 8% vinyl acetate, so that the stretch label as a stretch label can be used. Since the printing layer 2 is formed of a printing ink containing a polyurethane resin as a binder, the printing ink has good adhesion and flexibility, and the printing layer 2 has good adhesiveness and transparency. Can fully follow expansion and contraction.

Therefore, since there is almost no difference in the expansion / contraction ratio between the stretch film 1 and the printing layer 2, the fold lines 6, 6 of the stretch label folded flat along the fold lines 6, 6. No cracks 15 are formed in the film of printing ink at the position 6 and straight streaks 16 are formed on the label.

[0008]

【Example】

 As shown in FIG. 1, the stretch label according to the present invention is a strip-shaped film composed of a stretch film 1 and a printing layer 2 provided on one surface of the stretch film 1 except both end portions 1a and 1a thereof. As shown in FIGS. 2 and 3, the sheet 3 is polymer-bonded to the inside end 5a on one side and the outside end 5b on the other side of the film sheet 3 so that they can be fitted onto the container 4 respectively. It is formed into a tubular shape. Hereinafter, a specific embodiment of the present invention will be described.

The film sheet 3 is made of an ethylene-vinyl acetate copolymer containing 3 to 8% of vinyl acetate, and is a wettability index (JIS standard number JIS according to JIS standard number by a corona discharge treatment). -The surface tension determined by the "wetting test method" specified in K-6768) is 37 dyn / cm or more.

On the other hand, the printing layer 2 is applied by printing a character or the like by gravure printing or flexographic printing, and a polyether-based or polyester-based polyurethane resin is used as a binder of the printing ink. There is.

Further, the printing ink may be a one-component type or a two-component type in which modified polyisocyanate or the like is added as a hardening agent. Examples of such an ink include commercial products. One-component type or two-component type such as name NRX (manufactured by Osaka Printing Ink Manufacturing Co., Ltd.) can be used.

As described above, since the stretch film 1 used for the label is composed of a film made of an ethylene-vinyl acetate copolymer containing 3 to 8% vinyl acetate, its self-elastic contraction force is optimum, The container 4 is attached very effectively and tightly attached.

If the vinyl acetate content is less than 3%, it is difficult to elongate, and if it is more than 8%, the flexibility is excessively increased and the transparency is deteriorated, which is not preferable.

In addition to the structure of the stretch film 1, the printing layer 2 is composed of a printing ink containing a polyurethane resin as a binder, so that the film of the printing ink becomes considerably flexible, and further, the corona Since the printing layer 2 is provided on the surface that has been subjected to the discharge treatment, the ink adhesion is good, and therefore the expansion and contraction of the film 1 can be sufficiently followed.

Therefore, as shown in FIG. 4, the stretch label of the present invention is attached to a container by a conventional method, that is, the ends 5a and 5b of the film sheet 3 are joined together to form a tubular bag. After that (see FIG. 4 (a)), it is folded into a flat shape and wound into a roll (see FIG. 4 (b)), and then the wound film sheet 3 is sequentially fed out by an automatic loading machine or the like, Even if it is cut to a certain size 12 (see Fig. 4 (c)) and opened in a tubular shape (see Fig. 4 (d)), it can be fitted onto the container 4 such as a PET bottle, and the printed layer of the stretch label There is no crack 15 formed along the film of the printing ink in 2, especially along the fold lines 6 and 6 generated when folded in the flat shape. Since it will not be missing, it will not impair the printing condition and reduce the appearance appearance. Almost no such thing as cause.

When the film sheet 3 is formed into a tube, a corona discharge treatment 7 is further performed near the outer end 5b to improve the adhesiveness, and the adhesive 8 is used as a urethane adhesive. Since the inner end 5a and the outer end 5b are polymer-bonded by using a polyester-based two-component curable adhesive, the adhesiveness is sufficiently enhanced.

Further, the present invention is not limited to the above-mentioned embodiment, and for example, the method for polymerizing the film sheet 3 is the same as in the above-mentioned embodiment with the adhesive 8 to the inner end 5a and the outer side of the film sheet 3. In addition to polymerizing the end portion 5b, it can be performed by an appropriate known means such as heat sealing.

Further, in the above-mentioned embodiment, the stretch label is formed by forming one film sheet 3 into a tubular shape, but the label may be formed by a plurality of film sheets 3, 3. It is possible.

Further, the shape of the container 4 to be mounted is not limited to the one having a circular cross section as illustrated in the above embodiment, but may be a rectangular shape or a polygonal shape, and it goes without saying that it can be arbitrarily set. is there.

[0020]

[Effect of device]

 The stretch label according to the present invention comprises a stretch film and a printing layer provided on the inner surface side thereof, and the stretch film is a film made of an ethylene-vinyl acetate copolymer containing 3 to 8% vinyl acetate. Since it is used, it has the best stretchability and transparency as a stretch label and has excellent adhesion, and since it uses a printing ink with a polyurethane resin as a binder for the printing layer, The printing ink in the printing layer can sufficiently follow the expansion and contraction of the film.

[0021] Therefore, as in the prior art, along the fold line that was folded flat, the printing ink film at that position is cracked, and apparently a straight line is seen on the stretch label. The result is a stretch label with an excellent appearance that does not impair the printing condition.

Further, since the wetting index on the inner surface side of the stretch film is 37 dyn / cm or more by the corona discharge treatment, the adhesion of the ink in the printing layer provided on the stretch film is very good.

[Brief description of drawings]

FIG. 1 is a partially omitted sectional view showing an embodiment of a film sheet according to the present invention.

FIG. 2 is a sectional view of the stretch label.

FIG. 3 is a diagram of how it is used.

FIG. 4 is an explanatory view showing an example of a method of mounting the present invention and a conventional stretch label.

FIG. 5 is a cross-sectional explanatory view showing a conventional example.

FIG. 6 is a usage diagram showing a conventional example.

[Explanation of symbols]

 1 Stretch film 2 Printing layer 3 Film sheet 4 Container 6 Fold line 7 Corona discharge treatment part 8 Adhesive 9 Printing layer 10 Stretch film 13 Container 14 Fold line 15 Crack 16 Apparent line

Claims (2)

[Scope of utility model registration request] 1. A tubular bag-shaped product having a printing layer on the inner surface side.
(2) is provided with a flat film sheet (3) consisting of a stretch film (1) having self-stretchability, and is opened from the flat state into a cylindrical shape so as to be fitted onto the container (4). In the stretch label, the stretch film (1) is made of ethylene containing 3 to 8% vinyl acetate.
The printing layer comprises a vinyl acetate copolymer
(2) is a stretch label characterized by comprising a printing ink having a polyurethane resin as a binder. 2. The stretch label according to claim 1, wherein the wetting index on the inner surface side of the stretch film (1) is 37 dyn / cm or more by corona discharge treatment.